USES OF NON-LEGUMINOUS TREES IN SILVOPASTORAL SYSTEMS IN THE SOUTH OF THE STATE OF MEXICO
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The objective was to characterize the livestock production units (LPU) and identify the forage impor- tance, uses, and density of non-leguminous trees in silvopastoral systems in the south of the State of Mexico. Sixty-nine surveys were conducted to ascertain the current use of trees; on transects were evaluated their density, abundance and frequency; the diameter at breast height (DBH) and the height (h) of trees were measured metrically. The most important trees with regard to foraging were <em>Guazuma ulmifolia </em>(72.5 %) and <em>Crescentia alata</em> (63.8 %). These trees had the highest number of uses at seven and nine, respectively. The density of scattered trees and trees used for living fences was highest for <em>G. ulmifolia </em>(4.5 trees ha−1 and one tree per 100 linear m) and <em>C. alata </em>(7.2 trees ha−1 and 0.54 trees per 100 linear m). The DBH for scattered trees was highest for <em>C. alata </em>at 44.4 cm, while in the case of living fences it was highest for <em>Ficus glabrata </em>at 114.5 cm. We conclude that the outstanding PU accounting uses, foraging preference, and dasometric characteristics are accounted for by <em>C. alata</em> and <em>G. ulmifolia</em>, which as multiple purpose trees can be integrated in silvopastoral systems in the study area.